Advanced High-Strength Steels: Science, Technology, and Applications (original) (raw)
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Advanced High Strength Steel in Auto Industry: an Overview
Engineering, Technology & Applied Science Research, 2014
The world’s most common alloy, steel, is the material of choice when it comes to making products as diverse as oil rigs to cars and planes to skyscrapers, simply because of its functionality, adaptability, machine-ability and strength. Newly developed grades of Advanced High Strength Steel (AHSS) significantly outperform competing materials for current and future automotive applications. This is a direct result of steel’s performance flexibility, as well as of its many benefits including low cost, weight reduction capability, safety attributes, reduced greenhouse gas emissions and superior recyclability. To improve crash worthiness and fuel economy, the automotive industry is, increasingly, using AHSS. Today, and in the future, automotive manufacturers must reduce the overall weight of their cars. The most cost-efficient way to do this is with AHSS. However, there are several parameters that decide which of the AHSS types to be used; the most important parameters are derived from th...
Assessment of Advanced High Strength Steels used in Auto Industry – A Review
Advanced High Strength Steels (AHSS) are steels considered to be the major materials for future applications in automotive production and other sectors of the economy. In this article, assessment of advanced high strength steels (AHSS) used in automotive industry was discussed, including the steel compositions, microstructure and mechanical properties developed during thermal processing, advantages and disadvantages, their potential applications and performance in service. Various strengthening mechanisms are employed to achieve a range of strength, ductility, toughness, and fatigue properties of these materials. As opposed to the cold formable single phase deep-drawable grades, the mechanical properties of AHSS steels are controlled by many factors, including the following; phase composition and distribution in the overall microstructure, volume fraction, size and morphology of phase constituents, as well as stability of metastable constituents were discussed. Finally, a brief summary of these important steels was highlighted.
Safety is paramount importance along with enhancing fuel efficiency of the transport car over the last three decades. Advanced high strength steels play a pivotal role towards achieving the desired structural characteristics of the motor vehicles. Many structural components have been replaced by advanced high strength steels like IF steel, Bake hardening steel, HSLA steel, Micro alloyed steel, Dual Phase steel, Ferrite Bainite steel, Martensitic steel, Hot formed steel, TRIP steel, TWIP steel etc. along with austenitic and ferrite grade stainless steels due to its superior strength and ductility. In the current context it has been attempted to see the causes behind the development of those mentioned steels from conventional to third generation as well the strengthening mechanisms employed towards the development of advanced high strength structural steels. It has been observed from literature study that substantial development have been progressed from metallurgical point of view in this matter over the last decade.
High Strength Steel for Automotive Applications
The automobile industry has to meet the demands of fuel efficiency and consumer safety along with stringent government norms. moreover, the factors like air pollution and the weight of the vehicle also needs to be taken into consideration. as a result, the choice of the material becomes a key decision in automobile industry. High Strength Steels(HSS)have proved to be satisfying all the above demands as they offer good balance of low cost, light weight and good mechanical properties.
RECENT DEVELOPMENTS IN ADVANCED HIGH STRENGTH SHEET STEELS FOR AUTOMOTIVE APPLICATIONS: AN OVERVIEW
In recent years there has been an increased emphasis on the development of new advanced high strength sheet steels (AHSS), particularly for automotive applications driven by needs for vehicle weight reduction to improve fuel economy and for materials which lead to enhanced crash performance and passenger safety. Steels of current interest involve novel alloying and processing combinations to produce unique microstructural combinations and have been referred to by a variety of identifiers including, among others, DP (dual-phase), TRIP (transformation induced plasticity), HSLA (high strength low alloy), CP (complex phase), TWIP (twinning induced plasticity), and martensitic steels. The properties of these multi-phase steels are derived from appropriate combinations of strengthening mechanisms, the basics of which have been well developed in the steel literature. Continued developments of AHSS steels, designed for specific applications, will require careful microstructure control to optimize the specific strengthening mechanisms responsible for the desirable final properties. In this paper recent AHSS developments are examined, and approaches to produce high strength sheet steels with unique strength/ductility combinations are discussed.
Advanced High Strength Steels for Light-Weight Automotive
2015
Automotive is an inseparable part of the modern society and accounts for a sizeable share of our economy. It is a complex engineering product today, demanding a combination of properties for its variety of components. Notwithstanding the development of new materials and their increasing use, the iron-base materials still occupy the dominant position amongst the materials of construction of an automobile and represent around 64 percent of the weight, in which the share of steel is around 57 percent in a typical passenger car today. In a passenger vehicle . In a passenger car, the body-in-white (BIW) accounts for ~ 35% of the total weight and is a very demanding area, particularly because it is singularly responsible for the safety of the passenger (against crash).
Materials, 2021
While the third generation of advanced high-strength steels (3rd Gen AHSS) have increasingly gained attention for automotive lightweighting, it remains unclear to what extent the developed methodologies for the conventional dual-phase (DP) steels are applicable to this new class of steels. The present paper provides a comprehensive study on the constitutive, formability, tribology, and fracture behavior of three commercial 3rd Gen AHSS with an ultimate strength level ranging from 980 to 1180 MPa which are contrasted with two DP steels of the same strength levels and the 590R AHSS. The hardening response to large strain levels was determined experimentally using tensile and shear tests and then evaluated in 3D simulations of tensile tests. In general, the strain rate sensitivity of the two 3rd Gen 1180 AHSS was significantly different as one grade exhibited larger transformation-induced behavior. The in-plane formability of the three 1180 MPa steels was similar but with a stark contr...
Structure and Properties of Steels for Applications in Automobile Industry
The paper presents information about the notations, the structure and the properties of steels applied in automotive industry. A modeling-based approach is recommended to design the composition and for a suitable processing improving the mechanical plasticity attributes of steels with martensite structures. The research is supported by the Scientific Research Fund, the ДВУ 02/11 project. The research about the design of new kinds of steel continues with respect to the necessities of the automotive industry in the steel production. The considerable batch production and competitiveness of this industry requires a reduction of the production expenses via innovations in the technological domain and improving safety in cases of road accidents [1]. The research must reduce the weight of the final product via implying highly strength steels. The highly-strength steel applications are increased for simultaneous satisfying the variety of rather contradictory requirements related to the impro...